I've overloaded these as well, I really didn't expect to use these UPS for anything else but the following...

1. Stay running for the occasional brownout.. Little flicker off and on.
2. approx. 5min of runtime during a blackout, then power off all servers if power isn't restored.
3. Filter AC power for Pure Sinewave (Hardware longevity)
4. Surge protection

It is a pain to work with them.. they are heavy and awkward because the are small with no handles... Pulling them out of a data rack is no easy task. So I did put this off for a few months. But today I was mentally prepared!